Effects of Polyacrylamide and Slope Shape on Transportation of Soil Water and Nutrients from the Loess Sloping Land

XING Weimin; WANG Yitong; XU Haolin; YANG Peiling; AO Chang

doi:10.13870/j.cnki.stbcxb.2020.06.020

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Effects of Polyacrylamide and Slope Shape on Transportation of Soil Water and Nutrients from the Loess Sloping Land

更新时间：2025-03-12

- Effects of Polyacrylamide and Slope Shape on Transportation of Soil Water and Nutrients from the Loess Sloping Land
- Vol. 34, Issue 6, Pages: 135-142(2020)
- 作者机构：
  
  1. 扬州大学水利科学与工程学院,江苏,扬州,225009
  2. 中国农业大学水利与土木工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.06.020
  CLC： S157.1
- Published：2020
- 稿件说明：
移动端阅览
XING Weimin, WANG Yitong, XU Haolin, et al. Effects of Polyacrylamide and Slope Shape on Transportation of Soil Water and Nutrients from the Loess Sloping Land[J]. 2020, 34(6): 135-142.
DOI：

XING Weimin, WANG Yitong, XU Haolin, et al. Effects of Polyacrylamide and Slope Shape on Transportation of Soil Water and Nutrients from the Loess Sloping Land[J]. 2020, 34(6): 135-142. DOI： 10.13870/j.cnki.stbcxb.2020.06.020.

摘要

通过野外径流小区人工降雨试验，研究坡形和聚丙烯酰胺（PAM）对径流量、土壤侵蚀和养分流失的影响。试验设置2个PAM施用量，分别为0，2 mg/L；9种坡形处理，即4个凹形坡，4个凸形坡，1个直形坡。结果表明：（1）与均匀坡面相比，凸形坡的平均土壤流失量、氨氮流失量和磷酸盐流失量分别增加25.12%，24.01%和26.96%，且土壤和养分流失量随着凸形坡面的凸度增加而增加，凹形坡的平均土壤流失量、氨氮流失量和磷酸盐流失量分别减小13.53%，10.85%和19.95%；（2）凹形和凸形坡面的径流量差异很小，且均大于均匀面的径流量；（3）施用PAM后，3种坡形的坡面土壤流失均减少90%以上，养分流失减少28.19%~68.13%，且PAM施用在凸形坡上减少水土养分流失量效果最佳。

Abstract

To investigate the effects of slope shapes and polyacrylamide (PAM) applications on runoff

soil erosion and nutrient loss

this study conducted the field artificial rainfall experiments with two PAM application rates and nine slope shapes. The results showed that the average amount of soil

ammonia nitrogen and phosphate losses from convex slopes increased by 25.12%

24.01% and 26.96%compared to the uniform slopes

respectively

while those of concave slopes decreased by 13.53%

10.85% and 19.95%

respectively. Soil and nutrient losses were also increased with the increase of convexity in convex slopes. For runoff

there was little difference between concave and convex slopes

but the runoff amounts of both convex and concave slopes were greater than those of uniform slopes. After PAM application

the soil loss decreased by more than 90% and the nutrient loss decreased by 28.19%~68.13%. Application of PAM had the best effect on reducing soil erosion and nutrient loss in convex slopes.

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